US Railroads: Six Players, One Continent, Zero Competition

"Railroad stocks are the best business I've ever seen. Nobody is ever going to build another railroad."

– Warren Buffett, 2009, after acquiring BNSF for USD 44 billion

Hundreds.

Likely around 500.

That's how many Class I railroads (freight) operated across North America in the 1880s — the Gilded Age.

In 1980? Around 40. Today? Six. And the consolidation keeps going.

But we'll get to that.

First, a look back. Because this story doesn't begin in a boardroom. It begins on May 10, 1869. Promontory Summit, Utah. A golden spike. Four hammer blows. One telegram. And suddenly, a continent was connected.

Before: six months by stagecoach from New York to San Francisco. After: six days by train.

What followed was America's first real speculative bubble — and the rise of the men who built it. Among them: Cornelius Vanderbilt. He didn't just build railroads. He built dynasties — the same dynasties we explored in our latest Book Club. Empires that defined American capitalism for a century — and whose playbooks still echo in every infrastructure monopoly today.

By 1885, railroad stocks made up 63% of the entire US market capitalization (chart 1). Sixty-three percent. One single sector.

For comparison: today's AI Big 10 — the Magnificent 7 plus Broadcom, AMD, and Micron — sit at 40%. The 41 AI stocks in the S&P 500? 61%. The biggest concentration bubble of our era is being challenged by today's poster children (see also our arvy Notes).

Then came the collapse. Then the consolidation. Then a hundred years of mergers, bankruptcies, and regulation.

Today, six remain. They control over 220'000 miles of track — that’s the distance from Earth to the Moon.

Nobody will ever build another railroad. The right-of-way doesn't exist. The permits don't exist. The capital doesn't exist. This isn't a moat. It's a geological formation.

And that's exactly why Warren Buffett loves them.

And that fortress? It's about to get even tighter.

Enter US Railroads.

Chart 1: The History of Stock Market Bubble Concentration — Railroads at 63%, AI Big 10 at 40%

The Six US Railroads Players — and the Endgame

Six railroads. A continent. And a game of chess that has been playing out for 160 years.

For most investors, railroads are invisible. You don't think about them when you order from Amazon, fill up your car, or eat a steak. But one-third of all US freight moves by rail. Every ton of coal. Every container from the Port of Los Angeles. Every grain shipment from Kansas to the Gulf of Mexico (or America 😉).

And now, the industry is entering its endgame.

In July 2025, Union Pacific announced the acquisition of Norfolk Southern for $85 billion. The largest railroad deal in generations. If the Surface Transportation Board gives its blessing, it will create the first true transcontinental railroad in American history. Pacific coast to New York. No interchange. No delays. No friction.

UP covers the western two-thirds of the United States. NS covers the East. Together: 50'000 miles of track, 43 states, 10 international gateways. A single, seamless corridor from coast to coast.

This isn't one plus one. This is the birth of an empire.

And it raises the stakes for everyone else.

And here comes Warren Buffett into play.

Ever wondered what he could do with the $400 billion in cash sitting on Berkshire's balance sheet? Here is one answer. With UP and Norfolk Southern about to merge into the first true transcontinental railroad, BNSF — Berkshire's crown jewel — can no longer afford to sit still. The strategic logic is brutal: if you don't have a coast-to-coast network, you become a regional carrier in a market with two coast-to-coast competitors. The obvious move? BNSF + CSX. Price tag: somewhere around $85 billion + a takeover premium. A rounding error in Buffett's cash pile.

Buffett famously hates bidding wars. But he hates losing strategic position even more.

But to understand the endgame, you need to know the board (chart 2):

• Union Pacific — King of the West. Best operating ratio in the industry. The acquirer of Norfolk Southern and the aggressor in this consolidation wave.
• BNSF Railway — Berkshire Hathaway's crown jewel. Private since 2009. Buffett paid $44 billion. Today it would be worth triple. Patient capital at its finest.
• CSX Corporation — The Eastern champion. New CEO Steve Angel engineered the Linde-Praxair mega-merger. You don't hire a merger architect to run a stand-alone railroad. Potential Warren Buffett partner in a further consolidation move.
• Norfolk Southern — UP's acquisition target. Covering the East and the missing piece for UP's transcontinental vision.
• Canadian National — The three-coast network. Halifax to Vancouver to New Orleans. Exclusive access to Prince Rupert, British Columbia. North America's gateway to Asia.
• Canadian Pacific Kansas City — The only single-line corridor connecting Canada, the US, and Mexico. The nearshoring play of the continent. If Mexico becomes America's new manufacturing floor, CPKC carries the freight.

Six players. Six franchises. Each one irreplaceable.

What makes this industry so compelling isn't just the consolidation — it's what consolidation creates. Every merger tightens the moat. Every merger expands the network. Every merger improves operating leverage. From 500 players to 40 to 6 — and maybe soon to 4. The fewer the players, the stronger each one becomes. High barriers to entry. Pricing power. Recurring revenue. Capital discipline. And operating leverage that improves with every efficiency gain.

In other words: the ingredients of a "Good Story."

Let's dig in.

Chart 2: The Six Class I Railroads — Route Miles, Operating Ratio, Market Cap, Moat

Operating Ratio — the Holy Grail of US Railroading

A railroad has brutally simple economics.

Revenue minus costs equals profit. But the costs are enormous. Locomotives, rails, wages, diesel. The entire industry has agreed on a single metric that tells you everything you need to know: the operating ratio (chart 3). Costs divided by revenue. Lower is better. You recall a similar number in the banking sector, led by NU Holdings (efficiency ratio).

A good railroad sits below 60%. A great one below 58%. A struggling one above 65%. One number. The whole story.

Three things matter:

• PSR — Precision Scheduled Railroading: Invented by Hunter Harrison — a Memphis-born railroader who started as a teenage message boy on the tracks, never went to business school, and ended up transforming three different railroads. PSR revolutionized the industry: longer trains, fewer classification yards, clockwork departures, ruthless asset utilization. CN pioneered it, CP took it to extremes (OR from 80%+ to the low 50s), UP mastered it, and CSX/NS are still catching up. Master PSR and you consistently beat 60%. Ignore it and you stay stuck above 65%.
• Cyclicality: Railroads are a leveraged mirror of the US economy. Weak industrial production? Carloads drop. Consumer boom or nearshoring surge? Intermodal containers explode. Tariffs create pull-forward spikes followed by holes. Own the rails and you own a high-beta version of American GDP.
• Oil — friend and foe: Fuel surcharges pass through short-term diesel spikes, but high oil prices deliver a structural gift: one ton-mile on rail uses roughly one-quarter the fuel of a truck (rail moves a ton ~470 miles per gallon vs. ~130–150 for trucking). At $100 Brent, railroads gain decisive market share. At $60 Brent, trucks claw some back.

The fundamentals speak clearly.

UNP is the consistent best-in-class leader (adjusted OR ~59.9% in Q1 2026). CSX is competitive but more volatile. CP has shown the strongest decade-long improvement. CN sits solidly in the middle. NSC lags with the highest (worst) ratios, weighed down by execution issues. The 2020 pandemic spike reminded everyone: railroads are economic barometers — but they recover fastest thanks to PSR discipline.

The “Good Story” is undeniable. But at arvy, story alone is never enough.

Time for the “Good Chart.”

Chart 3: Operating Ratio Quarterly — CSX, CNR, CP, NSC, UNP (2015–2026)

US Railroads "Good Chart" — All-Time Highs on Rails

Despite all the underlying cyclicality, US railroad charts run like a Swiss watch. Bottom left to top right (chart 4). The trends confirm the fundamentals.

But what makes them truly compelling isn't the return. It's how these stocks behave when everything else falls apart.

• 2016 — China hard-landing fears. Global markets wobbled. Coal volumes collapsed. Railroad stocks corrected 15–20%. And recovered within months. The business barely flinched.
• 2020 — Covid. The American economy shut down overnight. Carloads plummeted. Yet railroads were among the fastest sectors to recover. PSR discipline meant they flexed costs down in weeks and flexed back up even faster. The V-shape in the chart tells the story.
• 2022 — The real test. Inflation surging. Oil spiking. Rates rising at the fastest pace in four decades. Most of the market suffered. Railroads held up remarkably well. Higher diesel made trucking more expensive relative to rail. Core pricing ran above inflation. Fuel surcharges passed through energy costs in real time.

When oil is the problem for most businesses, it becomes the tailwind for railroads. And as I wrote in "The Return of the Old Economy," there is reason to believe commodities — oil in particular — are entering a new structural bull cycle. If that thesis plays out, railroads are among the biggest beneficiaries.

That is the signature of a structural compounder disguised as a cyclical business. The drawdowns come. They always do. But they are shallower, shorter, and followed by new highs.

And here is the difference from 1885. Back then, 63% of the market in one sector — pure hype, no fundamentals to support the multiples.

Today? Wide moats. Oligopolistic pricing power. A network that is physically impossible to replicate. Operating ratios improving every decade. Free cash flow machines returning billions to shareholders, year after year.

Barriers to entry set in stone. All-time highs built on substance.

Buffett gave his answer 16 years ago.

Have you?

Chart 4: US Railroads over the last 10 years